Table 1 The following table provides a summary of the key results for third- and fourth-order sequences, Milankovitch astronomical cycles, Sediment Accumulation Rate (SAR), and frequency variations in wells A, B, and C. This table serves as a reference framework for the subsequent discussions.
From: Application of porosity logs for cyclostratigraphic analysis in the absence of gamma ray logs
Well | Log | Third-order sequences | Fourth-order sequences | Milankovitch astronomical cycles | SAR (cm/kyr) | Frequency Variation (m) | Water pattern |
|---|---|---|---|---|---|---|---|
A | DT | 1 | 4.5 | 1E, 0e, 1O, and 0P | 3.8 and 16.7 | 2470–2710 | R-T |
A | NPHI | 1.5 | 9.5 | 1E, 0e, 1O, and 0P | 1.9, 3.8, 6.5, 8.5, and 13.5 | 2470–2870 | R-T-R |
A | RT | 0.5 | 4.5 | 1E, 1e, 1O, and 1P | 2.4 | 2640–2780 | R-T-R |
B | DT | 1.5 | 3 | 1E, 1e, 0O, and 0P | 3 | 2580–2820 | R-T |
B | NPHI | 1.5 | 7 | 1E, 0e, 1O, and 1P | 2.8 and 12.6 | 2580–2840 | R-T |
B | RT | 1.5 | 4 | 1E, 1e, 1O, and 1P | 53.3 | 2640–2660, 2690–2710, 2730, and 2770–2870 | R-T |
C | DT | 2 | 4 | 1E, 0e, 1O, and 1P | 3.5 | 2580–2860 | R-T |
C | NPHI | 1 | 4.5 | 1E, 0e, 0O, and 0P | 2.4, 6.2, 8, and 10.3 | 2580–2860 | R-T |
C | RT | 1.5 | 2.5 | 1E, 0e, 0O, and 1P | 8.6 and 36.8 | 2610–2640, 2660–2670, and 2750–2860 | R-T-R |
